Corrections and clarifications

• An online comment piece said that a campaign group, Doctors for Reform, was funded by pharmaceutical companies (Vested interests hate good healthcare, 24 August, guardian.co.uk/commentisfree). Doctors for Reform states that while it does not disclose its donors, neither pharmaceutical firms nor individuals in the pharmaceutical industry are among them. We are happy to make this clear.

• Reporting an expedition's claim to have found many unidentified animal species in a volcano crater, we referred to the "island of Papua New Guinea"; that is the country occupying part of the island of New Guinea (Fanged frogs and giant rats, 7 September, page 1). In early editions the same piece, and a follow-up on page 8 ('Sometimes on this trip it seemed like everything we were looking at was new'), referred to a creature called the cuscus as a cucus. "At least," remarked a reader, "you didn't call it a polenta." A subsequent leader (In praise of... New Guinea, 10 September, page 34) should have said Papua New Guinea occupies the east of the island, while Indonesia governs the west.

• In a story package about party battle lines over public spending cuts, a panel (What are the Tory targets?, 9 September, page 5) said that constituency boundary changes take place every other election. In fact there are two elections between each change.

• Editing of a piece touching on impending changes at the BBC meant that a comment by one executive – "We don't yet know what those changes will be" – was merged with and attributed to another by the director general, Mark Thompson (BBC memo denounces James Murdoch as 'out of touch', 10 September, page 1).